Hetero-specific queen retinue behavior of worker bees in mixed-species colonies of Apis cerana and Apis melliferaMing-Xian Yang, Ken Tan, Sarah E. Radloff, Christian W.W. Pirk and H. Randall HepburnApidologie, 41 1 (2010) 54-61DOI: https://doi.org/10.1051/apido/2009047